Relay mechanism.



S. B. FOWLER.

RELAY MECHANISM.

APPLICATION FILED JUNE 5,1907.

Ptented Aug. 24, 1909 2 SHEETS-SHEET lnvn Em SEmUElB .nwiEF kry' 0%@ f j A @Pn EH WLDEGEEE 1 W 'the end extending beyond plate 1 for consuitable circuits. ln the upper is armature 43 there is also an 51.1 or receiving the contact end 86. extends from the armature le opening ft engaging the armature z mit the movement of armature el". i tic stops 56 also extend from the lot' armature 43 to prevent sticking nature to the cores: The armatures ally in theposition best shown in `he contact plate 50 at the end of s 'e i3 is vdisengaged from contact point l5l and the lower end of this armature is away from the core ends 4 and 5. Armature is away from cores 2 and 3 and its contact 38 engages contact 37 on the end rod 84. ln practice, as will be shown later7 the upper coils 9 and lO are connected with the line circuit, while the lower coils are connected with local circuits. The upper coils are, therefore, energized first and armature 25 is attracted to break engagement between contacts 38 and 37 and to establish o contact between contact plate 3U and contact point 3l. Armature 43 is carried with armature 25 and its contact plate 50, comes into engagement with contact point 5l. hen the lower cores now become energized, armature 43 will be attracted and contact between plate and point 51 will again be broken.

in F ig. 8 l have diagrammatically shown a telephone exchange system employing my improved relay mechanism and showing its adaptation and operation. A central eX- change ,C is atlaited for connection with subst-ations A an B. Each substation is provided in the usual manner with a switchhook 6G for supporting a receiver 6l, and a signal bell (S12 is shown as normally connected in series with a condenser 63 between the linev limb, c and contact 64C normally engaged by the switchhoolr. A transmitter 65 is also shown included in linelimbl a together with the primary winding 66 of the induction coilqv this line limb e' terminating in alternate contact 6'" l Ato be engaged by the switchhook' upon removal or" the receiver therefrom. The receiver is connected in circuit with the secondary winding 68 and the switchhook connected with line limb Z). Line limb a serially includes a winding, which may be winding Soif the relay j ust described, and terminates at the.negative` pole of the central station battery l?.I Line limb L includes a winding, which may be winding l() of the relay, terminates at the positive pole of the central station battery. These windings Si' and il() are connected in circuit to be cumulso suitably insulated from the rear plate aeree@ lative in their effect; The cores 2 and 3 are diagrammatically shown'as a common core, but the operation thereof is understood. The cores et and 5 are also diagrammatically slLown as a common core which carry the windings 1l Land l2, which are cumulative in their effect; The armatures and contacts are viven the' same reference characters as in the detail views otl the relay. Extending from line limbs o, and i arethe tip and sleeve jaclr springs 69 and 70 for engaging the tip and sleeve contacts 7l and 72 oi' theanswei'- ing plug y) of the cord circuit. A third contact 73 of this plug engages the jack thimble Tet when the plug is inserted, Plug contacts l7l and 72 terminate in hey springs 7 5 and 7S,

respectively, normally connected with ringing key springs 77 and 78, which terminate in tip and sleeve contacts 7l and 72 of calling' plug p. Plug contact 73 engages its thimble T-Ll when the plug is inserted into yjack springs and 69. lhe reference characters for the called side of the circuit are the saine as those of the calling side eX- c'ept that they are primed. Upon actuation of springsl 75 and 7o the operators telephone Iset li will be connected in circuit in a wellknown umnner. and upon actuation of springs 77 and TS ringing generator l will bc connected with the cord circuit in a well- "rnown manner. Qonductoi's 79 and 7U" connect, respectively, `w`th plug contacts 73 and 73 and are connec ogether at their other terminall and through conductor 8O with positive terminal bf battery l. Included in conductor 79 is the supervisory lamp 8l, and in conductor 79 is supervisory lamp 8l. A conductor 82 connects contact :3l ci the relay with the positive bus bar oitl the battery and includes the line lamp One terminal ol" windings ll and l2 connects through conductor Se with thimble 74, and the other terminal connects through conductor S5 with contact 3l of the relay. Contact 37 of the relay also connects through conductor SG with conductor Sil and with the jack thimble 74.

rlhe operation of the system can now readily be followed. Suppose subscriber atv desires communication with substation subscrilier at substation B. He removes his receiver from the hook and closes circuit through the line limbs (L, '0, windings 9 and l() oi' the line part ci' the relay and through the main battery l. Armature 25 is then attracted to breuk engagement with contact 37 and to establish engagement with contact 3l and armature L3 is also -ai'i'icd into electrical engagement with contact 5l.

through the indicating lamp Sil, traced 'from positive busy bar, through lamp 83, contact 51, armature 43, through the armature supporting framework and through conductor 87 to negative bus bar, the line lamp then illuminating to indicate to the operator that Thus' `far the only circuit closed will be lthe circuit ci'rciiit'ie closed: from positive teriiiinal of hutte; f

'being broken 'through` the windings ll, l2

celled. The oprator iii-- l. j) into the Siiringjaol neces the answering coro.

. i line l'inihs a iifiil i) and battery, oon actuation' of springs T5 and 7G c nnen.; ier telephone Set in circuit and ascertains the desired connection which, as assumed, is with siilistation B. Upon insertion of i'zlie plug in the jiicli the following through conductorzsI 8O and T9, Supervisory lziiiip Sl, plug Contact: t'ii Til, coiitluclor Si, Athrough l2. through, armature con- 25 iinil'coinliuctor Sito the negative terminal ot the battery. this,l causing citroenen f iii'iiiiitnre #t3 which thereby disi'Toniice-ts iin Contact 51. 'thug opening the 'circuit 'tirougli the line lziiiip 83. Supert i'isory linnn SL. however, will not illuminate. for the reason that` the resistance of wiiiclil, l2 such :is will prevent sufficient current l'low to illuminate lainp Si. for, tlien, both line and supervisory lampe l are unilliiiniiieteil. The operator inserts g plug p" into the jack connected with substation und tlierebj7 cruises closure oi? the supervisory circuit through lzinip ill" iis follows: from positive pole of buttery through conductors il() :nul TSV. through supervisory lmnp 8l. plug contact T3. tliinilile 'T4'. con.- (luctor 8e2. conductor 8(5, zii'n'niture 25v and' conductor Si" to negative lius hai'. wWhen the signal bell ut substation B is rung upon actuation of springe 77 sind T8 by the operator :intl the subscriber in reply answers, circuit will close@L through relay windings" i0, ll,-ziiid armature 25 fi'iriictetl to breuk connection with its front Contact 3T and into engagement with rear Contact 3l.

The Sniperwisor;v circuit is therefore broken :intl circuit cloeed through 7lic relay Winti ings ll', l2', whereupon :irninture 43, will be attracted unil lwill prevent closure through i and illuiiiiniition-of line liinip 83. All linipsy are now uiiilliiniiniiteil :intl the suliscrihersin con vei'siition with euch other. lu Soon ns they here lininhed they -liiiiig' up their receivers, ii'liicliresults iii opening` or the circuit through the line relay windings anti .re, lense or iii'iniiiiii .e ziiiil The Supervisor;v circuitsl through lamps El anti Si' :ire closed lo 521i e 'the disconnect. signa.. Circuit l iinfl ilq Q', upon restoraiioii of :irniaturee iiiio' 2 iiiiiiiitui'es and. eli-3 Lire also i ,i in ice'ioiieze 'to the Supervisorv L. i nl imo. .Lil l' T mehr ini oi i uiiinime .ne p ugs troni ine pu l iii ieoy breaking tlieciicuits ''.liroueli the eu ,iervisory linups und restoring ihe eiitii un to norinzil. mliiisyinsteail or einpn i .y k ii plurality of relay iiieeiiiin-4 isms orcontrov ing the line un? sugervisory signals, :i vSimple iiiiitiiry relay structure is eiiiiiloyeil whose armatures eoiirol the line Thus [l .electroiniigiieti Sait ziriiiiiture ie in and supervieory Signals. The line nel circuit is controlled directly by the cutoi reluy piii't iii'iiiiiture. this iii'niiitui'e beingy hollil)Y carried by the line reliiy port. iirnizitiure to close circuit through 'the line linnn when 7o `the subscriber calls, ii'nii 'wn-en the operator `inserts the plug,

circuit is cloeod through the cut-oli1 relay part to iitriiet` its iirniiiture to zi'ziiii o )en the line sional circuit.

utor pluggs'in thin,I circuit will he coiiiplctcil intl the liiic liiiiip extingiur-lieti` llvlien thi` subscriber hzinge up the i'cceiif'er the li lziy puri armature losen the sui4 Yrieorv cuit. rnuitures 25 `will ziel, :in :i ni` xeliielil towzirrl iiriniiiures 43 :intl so puf :irnuitures lil 'roni being` iiilliiencefl hf; niiignetisni :set` up in the cores of the line relay part.

l do not wish to he limited to the ooiistruction und particular errang Vnent which have herein shown, es changes i" y be niiiile without tleluirting' troni tl eich nii" inventionn intl l lenire to secure by Letter.' Potent the' following claims:

l. In :i device ol the elm-S describe- 1, the combination ol a support y iiinic, zin e .cti'onizignetextending from the i'riiine, u first armature pivoted in front of the poles oi".E the electroniiignet, a eecoii'fA electroniiigne'z 05;-- tentling from 'the n' fonti. fiiiiizitu disposed in front "l Ironic, :i

the poles oif ine eeconu second :irniiitui-e heilig` pivotetl to the first miniature to he bodily cii rieti by the first ziriiiziturc when said first ved upon changes olf i my netisin in the i" i, electroiiizignei.. chung'- magnetism in theeeconilelwlroiinigr 'feeling onlyY the .fl iiiiiiiii nrniiitui'e irting es :i iiuiiiiiel'i Vent the seconil':iin'iziture l' iicticiill5 inluiniccil by inzio; the first electi'oiiin :inielil lo prey reni lieingij io netiic changes ni'.

the poles?"thereof7 an ziriiinture for tlie'seconil electromagiife parallel to' the first urnniiure. :incl piv'oted thi-ret( iii iiiterii'ieclinte point onergizzition' oI the elecnroniiignet cnn' ing` attraction of itu :irninture und, liocliiuf nioveuieiity oi the second iirnieture, anti enorgiziiiozi of tliesecoiid elect-roiiiagiie; causing: uit action ol its armature.

3. in a. device of the Cio/ss descriliech the combination o' two parallel oiecibroiiisigiietu. un iirnizituro-,or one electroniagriet7 ui 13@ armature for the second electromagnet arranged parallel to the rst armature and pivoted thereto, a conta'ct for the first armaelectromagnet causing attraction of its armature into engagement with its contact, and a contact for the second armature, attraction of the first armature causingthe second armature to be carried bodily thereby into engagemerit with its contact, energization Vof the Isecondelcctroinagnet causing attraction of the second armature and disengagement 1 5 thereof from its contact.

4. In a device of the class described, the combination of two parallel electromagnets mounted on a common frame, an armature for one of the electromagnctspivoted be- 2G tween the electromagnet ends, an armature for the second electromagnet pivoted at aniaitermediate point to the armature for the first electromagnet so that attraction of thefirst armature will cause the second armature to be bodily carried thereby, and contacts for the armatures.

5. In a device of the class described, the combination of twoparallel electromagnets, /an armature frame of magnetic material for the first electromagnet, an armature frame of magnetic material for the second electromagnet, the first armature frame being` disposed adjacent the end of the first electro-V magnet, the second armature frame being disposed adjacent the ends of both electromagnets and being pivoted to the first armature frame, energization of the firstelectromagnet causing magnetic attraction of its armature frame and bodily movement of the second armature frame, energization of tlie second electromagnet causing magnetic attraction of its armature frame, the rst arn'iature frame acting as a magnet-ic shield to prevent magnetic attraction of the second armature frame by the first electromagnet.

In a device of the class described, two electroiuagnets, an armature for one electroiaaguctadjacent its pole ends,'an armature for the second electi'oniagnet adjacent the pole ends of both electromagncts, said first two electromagnet frames extending therefrom. anv armature for tliefirst electromagnetframe pivoted adjacent thev pole ends thereof, a contact rod extending forwardlyv from said supporting plate and adapted to be engaged at its end by the armature of the first electromagnet upon energization estesa thereof, an armature for the second electromagnet pivoted to the armature of the first electromagnet, a contact rod extending forture, the weight ofthe second armature ser`v- 5 ing to normally withhold the first armature `from said contact, energization ofthe first.

wardly from the supporting plate to be engaged at its end bythe second armature upon attraction of the first armature, energization of the second electromagnet frame causing disengagement of the second armature from its contact.

8. In a device of the class described, the combination of a main supporting plate, two electromagnet frames extending parallelly therefrom, an armature for the first electromagnet frame, a contact rod extending forwardly from the supportinoplate with its end arranged to be normally engaged by said armature, a contact rod eX- tending forwardly fromV the supporting plate to be engaged by the armature upon energization of the electromagnet frame, Ian armature for the second electromagnet frame pivoted to the' armature of the first electromagnet frame, a contact rod extending forwardly from the supporting plate to be engaged by the second armature upon attraction of the first armature, energization of the second electromagnet frame causing disconnection of the second armature from its contact.

'9. In a device of the class described, the combination of two electromagnets, an armature for one electromagnet pivoted adjacent its end, and an armature for the second elec- 'tromagnet disposed adjacent the ends of both electromagnets, one armature acting as a magnetic shield to prevent its electroyinagnetfrom,attracting the other armature.

10. In a'device of the class described, the combination of two parallel electromagnets forming a unitary structure, an armature for one electromagnet pivoted adjacent its end, an armature for the second electromagnet disposed adjacent the ends of both electromagnets, the first armature acting as a magnetic shield to prevent attraction of 'the second armature by the first electromagnet.

l1. In a device of the class described, the combination of two parallel eleetromagnets, an armature for one electromagnet pvoted adjacent its end, an armature forthe other electromagnet disposed adjacent the ends of both electromagnets, and a spring interposed between the armatures and tending to .resist attraction `of the armature for the second lelectromagnet by said electromagnet.

In witness whereof, I hereunto subscribe my name this first day of J une A. 11,1907. SAMUEL B. FOWIJER? Witnesses:

' IV.. E. DooLrrrLn, y

LOUISE W. KAUFFMAN.

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